You're reading from Mastering Embedded Linux Programming Create fast and reliable embedded solutions with Linux 5.4 and the Yocto Project 3.1 (Dunfell)

Product type Paperback

Published in May 2021

Publisher Packt

ISBN-13 9781789530384

Length 758 pages

Edition 3rd Edition

Languages

C++

Tools

Linux

Concepts

Embedded Systems

Authors (2):

Frank Vasquez

Mr. Chris Simmonds

View More author details

Table of Contents (27) Chapters

Preface

1. Section 1: Elements of Embedded Linux

2. Chapter 1: Starting Out FREE CHAPTER

3. Chapter 2: Learning about Toolchains

4. Chapter 3: All about Bootloaders

5. Chapter 4: Configuring and Building the Kernel

6. Chapter 5: Building a Root Filesystem

7. Chapter 6: Selecting a Build System

8. Chapter 7: Developing with Yocto

9. Chapter 8: Yocto Under the Hood

10. Section 2: System Architecture and Design Decisions

11. Chapter 9: Creating a Storage Strategy

12. Chapter 10: Updating Software in the Field

13. Chapter 11: Interfacing with Device Drivers

14. Chapter 12: Prototyping with Breakout Boards

15. Chapter 13: Starting Up – The init Program

16. Chapter 14: Starting with BusyBox runit

17. Chapter 15: Managing Power

18. Section 3: Writing Embedded Applications

19. Chapter 16: Packaging Python

20. Chapter 17: Learning about Processes and Threads

21. Chapter 18: Managing Memory

22. Section 4: Debugging and Optimizing Performance

23. Chapter 19: Debugging with GDB

24. Chapter 20: Profiling and Tracing

25. Chapter 21: Real-Time Programming

26. Other Books You May Enjoy

Booting the kernel

Booting Linux is highly device-dependent. In this section, I will show you how it works for the Raspberry Pi 4, BeagleBone Black, and QEMU. For other target boards, you must consult the information from the vendor or from the community project, if there is one.

At this point, you should have the kernel image files and the device tree blobs for the Raspberry Pi 4, BeagleBone Black, and QEMU.

Booting the Raspberry Pi 4

Raspberry Pis use a proprietary bootloader provided by Broadcom instead of U-Boot. Unlike previous Raspberry Pi models, the Raspberry Pi 4's bootloader resides on an onboard SPI EEPROM rather than on a microSD card. We still need to put the kernel image and device tree blobs for the Raspberry Pi 4 on a microSD to boot our 64-bit kernel.

To begin, you need a microSD card with a FAT32 boot partition large enough to hold the necessary kernel build artifacts. The boot partition needs to be the first partition on the microSD card. A partition...